It seems that Redmatica have taken down their page since the Apple acquisition.
Redmatica made great software which expanded upon what the EXS24 was capable of. Redmatica software had excellent EXS24 sampler management tools, and advanced sampling features which were not present in the EXS24. They also had brilliant sampler key mapping software.
I wish I could point you to some sites explaining some of Redmatica's software, but they definitely seemed to have disappeared after the acquisition.
You can take a look at the macProVideo that was done awhile back on their [b]Keymap[/b] software to get an idea of where the EXS24 may be going.: